User`s manual

Operation and Features
3-20 BASLER A302f
DRAFT
3.11 Available Video Formats, Modes, & Frame Rates
3.11.1 Standard Formats, Modes, and Frame Rates
on the A302fs Monochrome Camera
The following standard video formats, modes, and frame rates are available on the A302fs:
Format_0, Mode_5, FrameRate_1 (Mono, 8 bits/pixel, 640 x 480 pixels at 3.75 fps)
Format_0, Mode_5, FrameRate_2 (Mono, 8 bits/pixel, 640 x 480 pixels at 7.5 fps)
Format_0, Mode_5, FrameRate_3 (Mono, 8 bits/pixel, 640 x 480 pixels at 15 fps)
Format_0, Mode_5, FrameRate_4 (Mono, 8 bits/pixel, 640 x 480 pixels at 30 fps)
3.11.2 Customizable Format and Mode on the
A302fs Monochrome Camera
The following customizable video format and mode is available on the A302fs:
Format_7, Mode_0
Format_7, Mode_0 is available on the A302fs. This mode is used to enable and set up the area
of interest (AOI) feature described in Section 3.7. When the camera is operating in Format_7,
Mode_0, the frame rate can be adjusted by setting the number of bytes that are transmitted in
each packet. The number of bytes per packet is set using the BytePerPacket field of the
BYTE_PER_PACKET control register that has been established for Format_7, Mode_0.
The value that appears in the MaxBytePerPacket field of the PACKET_PARA_INQ control
register will show the maximum allowed setting for the bytes per packet. When the bytes per
packet is set to the maximum, the camera will transmit frames at the maximum allowed rate. By
default, the bytes per packet are set to the maximum.
The maximum bytes per packet will vary depending on the size of the AOI. This occurs to avoid
image buffer under-runs. The rate of image data flowing out of the image buffer must be correctly
balanced against the amount of image data entering the buffer.
If you set the bytes per packet to a value lower than the maximum allowed, the camera will
transmit frames at a lower rate. The rate is calculated by the formula:
The value that appears in the UnitBytePerPacket field of the PACKET_PARA_INQ control register
will show the minimum allowed setting for the bytes per packet. The bytes per packet must not be
set lower than the minimum.
The minimum bytes per packet will vary depending on the size of the AOI. This occurs because
of hardware limits on the link layer controller.
*
When the camera is operating in Format_7, Mode_0, the CUR_V_FRAME_RATE
control register is not used and has no effect on camera operation.
Frames/Sec.
1,000,000 µs
Packets per Frame x 125 µs
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